Click on map to open large map in new window (Map updated: 11 August 2009)

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.The map is generated through the NBN Gateway using their Interactive Mapping Tool.

The coarsely granular, bright green and yellow crustose thallus of this lichen should be searched for wherever iron-rich rocks occur. Yellow soredia arise from the upper surface and not the edges of the areoles, often forming a continuous sorediate crust. Old, shaded copper and metal mine dumps may hold the best chance of finding this species. Discs are rare. Reactions negative. In Ireland, the species occurs mostly in the south and south-east.